Figure 3

Imaging of the knee. a: radiograph: well limited lytic condylar image with a sclerotic rima. b: Axial CT scan of the knee showing a lytic lesion with calcifications and without cortical disruption. c: MRI T2-weighted image shows a homogeneously hypointense and well delineated lesion. There is no peri lesional edema. d: Femur clear cell chondrosarcoma on hematoxylin and eosin staining shows morphologically an indistinct lobularity and fine fibrovascular septa separate sheets of clear cells associated to delicate trabeculae of osteoid and rare multinucleated giant cells (x100 of magnification). e: Radiograph of the knee after curettage, phenolization, and cementation.